The only products affected are those which have a 4 in the batch number in the format xx4x or xxx4x. Have a look at the image above to see what that means.

Anyway, under certain conditions, these bulbs could pose an increased risk of getting an electric shock. With that, while Verbatim don't actually think these will be sending volts through you any time soon, they don't want to risk it and are happy to replace them.